AU2022249485A1 - Heat exchanger, and outdoor unit comprising said heat exchanger - Google Patents
Heat exchanger, and outdoor unit comprising said heat exchanger Download PDFInfo
- Publication number
- AU2022249485A1 AU2022249485A1 AU2022249485A AU2022249485A AU2022249485A1 AU 2022249485 A1 AU2022249485 A1 AU 2022249485A1 AU 2022249485 A AU2022249485 A AU 2022249485A AU 2022249485 A AU2022249485 A AU 2022249485A AU 2022249485 A1 AU2022249485 A1 AU 2022249485A1
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- Prior art keywords
- heat exchanger
- header
- refrigerant
- room
- distributor
- Prior art date
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- 239000003507 refrigerant Substances 0.000 claims abstract description 92
- 238000005192 partition Methods 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 abstract description 10
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 17
- 238000001816 cooling Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/46—Component arrangements in separate outdoor units
- F24F1/48—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow
- F24F1/50—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow with outlet air in upward direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/18—Heat exchangers specially adapted for separate outdoor units characterised by their shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
- F28F9/0275—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple branch pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Other Air-Conditioning Systems (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Provided is a heat exchanger with which a decrease in a heat exchange amount due to a non-uniform wind speed distribution can be suppressed. The heat exchanger comprises: an inlet header (20); an outlet header (21); a plurality of chambers (31) partitioned by partitioning panels (30) on the inside of the inlet header (20); a plurality of flat tubes (22) that are arranged in parallel and connected to the chambers (31) and the outlet header (21); a distributor (25) provided to a refrigerant pipe (10); and a plurality of branching pipes (24) connected to the chambers (31) and the distributor (25). In accordance with a wind speed distribution, branching sections (27) are provided to the branching pipes (24) between the chambers (31) and the distributor (25). The number of branching sections (27) of a branching pipe (24) that is connected to a chamber (31) to which a flat pipe (22) positioned at a portion with a high wind speed is connected is less than the number of branching sections (27) of a branching pipe (24) that is connected to a chamber (31) to which a flat pipe (22) passing through a portion with a low wind speed is connected.
Description
Title of Invention: HEAT EXCHANGER AND OUTDOOR UNIT
Technical Field
[0001]
The present invention relates to, for example, a heat
exchanger used in an upward-blowing type outdoor unit in an
air conditioner, and an outdoor unit including the heat
exchanger.
Background Art
[0002]
In the upward-blowing type outdoor unit of the air
conditioner, a blower fan is provided at an upper portion,
a vertically long heat exchanger is provided below the blower
fan, and outdoor air is sucked in by the blower fan. As a
result, the outdoor air passes through the heat exchanger and
exchanges heat with the refrigerant flowing through the heat
exchanger. In this case, since the blower fan is provided
at the upper portion, the air velocity of the air passing
through the heat exchanger due to the suction of the outdoor
air by the blower fan is fast on the upper portion side close
to the blower fan and slow on the lower portion side far from
the blower fan. Therefore, an air velocity distribution of
the air passing through the heat exchanger becomes nonuniform.
As a result, since the ability of the heat exchanger cannot be used effectively, there is a problem which is causing a decrease in the amount of heat exchange and a decrease in blowing performance.
[00031
In order to solve this problem, PTL 1 discloses an
invention that includes a heat exchanger that causes a
refrigerantto flow throughaplurality ofheat transferpipes
arranged in parallel, a refrigerant distributor including a
header and a distributor and a capillary tube, the header that
is connected to one end of the plurality ofheat transfer pipes
and is installed in a vertical direction with the inside
separated by partition plates, the distributor for
distributing and inflowing the refrigerant to each of the
rooms in the header separated by the partition plates and the
capillary tube connected to each of the rooms from the
distributor, in which a length and an inner diameter of the
capillary tube is set depending on an air velocity
distribution in the heat exchanger.
[0004]
In the heat exchanger and the refrigerant distributor
disclosed in PTL 1, since the length and the inner diameter
of the capillary tube is set depending on the air velocity
distribution in the heat exchanger, a decrease in the amount
of heat exchange due to the nonuniform air velocity
distribution of the air passing through the heat exchanger
in the upward-blowing type outdoor unit can be suppressed.
Citation List
Patent Literature
[00051
PTL 1: W02013/160952 Al
Summary of Invention
Technical Problem
[00061
However, there is a problem, in the heat exchanger and
the refrigerant distributor disclosed in PTL 1, in that a
length and an inner diameter of the capillary tube are set
depending on the air velocity distribution in the heat
exchanger, but since the flow rate is adjusted by increasing
the flow path resistance using a capillary tube, the pressure
loss increases and the air conditioning capacity decreases.
[0007]
Further, the length and the inner diameter of the
capillary tube are set depending on the air velocity
distribution in the heat exchanger, but in order to lengthen
the capillary tube or reduce the inner diameter of the
capillary tube, it is necessary to prepare several types of
capillary tubes with different lengths and inner diameters
according to the specifications of the heat exchanger, which
causes a cost increase.
[00081
In view of the above problems, the present invention
provides a heat exchanger that can suppress a decrease in the
amount of heat exchange due to the nonuniform air velocity
distribution.
Solution to Problem
[00091
A first aspect of the present invention is a heat
exchanger including an inlet header located on a refrigerant
inlet side, an outlet header located on a refrigerant outlet
side, a plurality of rooms partitioned by partition plates
and provided inside one header of the inlet header or the
outletheader, aplurality offlat tubes connectedinparallel
between each room of the plurality of rooms provided in the
one header of the inlet header or the outlet header and the
other header of the inlet header or the outlet header, a
distributor provided in a refrigerant pipe, a plurality of
branch pipes connected to each room and the distributor, in
which the branch pipe has a branch portion provided between
the room and the distributor depending on an air velocity
distribution in the heat exchanger, and the number of the
branch portions of the branch pipe connected to the room, to
which the flat tubes located in a part having a high air
velocity are connected, is less than the number of the branch
portions of the branch pipe connected to the room, to which
the flat tubespassing throughaparthavingalow air velocity
are connected.
[0010]
Further, a second aspect of the present invention is an
upward-blowing type outdoor unit of an air conditioner in
which a blower fan is provided at an upper portion and the heat exchanger according to the first aspect of the present invention is provided below the blower fan.
Advantageous Effects of Invention
[0011]
In view of the above problems, the present invention
provides a heat exchanger that can suppress a decrease in the
amount of heat exchange due to the nonuniform air velocity
distribution.
Brief Description of Drawings
[0012]
FIG. 1 is a refrigerant circuit diagram of an air
conditioner according to an embodiment of the present
invention;
FIG. 2 is a longitudinal cross-sectional view of an
outdoor unit of the air conditioner according to the
embodiment of the present invention; and
FIG. 3 is a schematic diagram of a heat exchanger of the
air conditioner according to the embodiment of the present
invention.
Description of Embodiments
[0013]
Hereinafter, embodiments of the present invention will
be described in detail based on the accompanying drawings.
As the embodiment, an air conditioner in which an indoor unit
is connected to an outdoor unit and a cooling operation or a heating operation can be performed in the indoor unit will be described by way of an example. The present invention is not limited to the following embodiments, and various modifications can be made without departing from the gist of the present invention.
Examples
[0014]
An air conditioner 1 will be described with reference
to FIG. 1. FIG. 1 illustrates a refrigerant circuit diagram
of the air conditioner 1 according to an embodiment of the
present invention. The air conditioner 1 is capable of a
cooling operation and a heating operation, and includes an
outdoor unit 2 arranged outdoors and an indoor unit 3 arranged
indoors. The outdoor unit 2 includes a compressor 4, a
four-way valve 5, an outdoor heat exchanger 9, and an outdoor
unit-side expansion valve 7, which are connected by a
refrigerant pipe 10, and the indoor unit 3 includes an indoor
unit-side expansion valve 6 and an indoor heat exchanger 8,
which are connected by the refrigerant pipe 10, and a
refrigerant circuit 11 is composed of the compressor 4, the
four-way valve 5, the outdoor heat exchanger 9, the outdoor
unit-side expansion valve 7, the indoor unit-side expansion
valve 6, and the indoor heat exchanger 8. The outdoor heat
exchanger 9 is the heat exchanger in the present invention.
Further, the outdoor unit 2 includes a blower fan 16 for
sending outdoor air to the outdoor heat exchanger 12, and the
indoor unit 3 includes an indoor fan (not illustrated) for sending indoor air to the indoor heat exchanger 8. The four-way valve 5 is connected to the discharge side of the compressor 4 and is a switching valve that changes a direction of the flow of the refrigerant that circulates through the refrigerant circuit 11 during the cooling operation and the heating operation. During the cooling operation, the refrigerant discharged from the compressor 4 flows through the four-way valve 5 to the outdoor heat exchanger 9, the outdoor unit-side expansion valve 7, the indoor unit-side expansion valve 6, the indoor heat exchanger 8, the four-way valve 5, and the suction side of the compressor 4, and during the heating operation, the refrigerant discharged from the compressor 4 flows through the four-way valve 5 to the indoor heat exchanger 8, the indoor unit-side expansion valve 6, the outdoor unit-side expansion valve 7, the outdoor heat exchanger 9, the four-way valve 5, and the suction side of the compressor 4. In FIG. 1, the solid line arrow indicates the flow of the refrigerant during the heating operation, and the dashed line arrow indicates the flow of the refrigerant during the cooling operation.
[0015]
The flow of the refrigerant in the refrigerant circuit
11 during the heating operation will be described. During
the heating operation, the refrigerant that is compressed by
the compressor 4 and becomes high-temperature and
high-pressure flows through the four-way valve 5 to the indoor
heat exchanger 8. The high-temperature and high-pressure
refrigerant that flows through the indoor heat exchanger 8 dissipates heat by exchanging heat with the indoor air sent by the indoor fan, and warms the indoor air that exchanged heat with the high-temperature and high-pressure refrigerant.
The refrigerant that dissipates heat when passing through the
indoor heat exchanger 8 is depressurized by the outdoor
unit-side expansion valve 7 after passing through the indoor
unit-side expansion valve 6, resulting in a two-phase
refrigerant state in which gas refrigerant and liquid
refrigerant are mixed. The refrigerant in the two-phase
refrigerant state flows through the outdoor heat exchanger
9 and absorbs heat by heat exchange with the outdoor air sent
by the blower fan 16 when passing through the outdoor heat
exchanger 9 and becomes a gas refrigerant. The refrigerant
that has absorbed heat and became a gas refrigerant returns
to the compressor 4 through the four-way valve 5 and is
compressed again at a high temperature and high pressure.
[0016]
Next, the flow of the refrigerant in the refrigerant
circuit 11 during the cooling operation will be described.
The switching from the heating operation to the cooling
operation is performed by changing the direction of the flow
of the refrigerant which circulates through the refrigerant
circuit 11 using the four-way valve 5. During the cooling
operation, the refrigerant that is compressed by the
compressor 4 and becomes high-temperature and high-pressure
flows through the four-way valve 5 to the outdoor heat
exchanger 9. The high-temperature and high-pressure
refrigerant that flows through the outdoor heat exchanger 9 dissipates heat by exchanging heat with the outdoor air sent by the blower fan 16, and the refrigerant that exchanged heat with the outdoor air becomes a high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant passes through the outdoor unit-side expansion valve 7, and then is depressurized by the indoor unit-side expansion valve 6, resulting in a two-phase refrigerant state in which gas refrigerant and liquid refrigerant are mixed. The refrigerant in a two-phase refrigerant state flows through the indoor heat exchanger 8 and absorbs heat by heat exchange with the indoor air sent by the indoor fan when passing through the indoor heat exchanger 8 and becomes a gas refrigerant. The refrigerant that has absorbed heat and became a gas refrigerant returns to the compressor 4 through the four-way valve 5 and is compressed again at a high temperature and high pressure.
[0017]
Next, the outdoor unit 2 will be described using FIG.
2. FIG. 2 is a longitudinal cross-sectional view of the
outdoor unit 2, and the upper portion side indicates anupward
direction, and the lower portion side indicates a downward
direction, in a state where the outdoor unit 2 is installed.
The outdoor unit 2 is a so-called upward-blowing type outdoor
unit, and has a chassis 15 with an opening at an upper portion
as a ventilation port 18, and an opening on a side surface
as a suction port 17. Inside the chassis, the blower fan 16
is provided close to the ventilation port 18, and a vertically
long outdoor heat exchanger 9 is arranged below the blower fan 16, facing the suction port 17. The outdoor air is sucked from the suction port 17 by driving the blower fan 16, the sucked outdoor air passes through the outdoor heat exchanger
9 and exchanges heat with the refrigerant passing through the
outdoor heat exchanger 9, and the outdoor air that has passed
through the outdoor heat exchanger 9 is blown out of the
outdoor unit 2 through the ventilation port 18. The arrows
in FIG. 2 indicate the magnitude of air velocity, with the
longer arrows indicating higher (faster) air velocity than
the shorter arrows. Since the upward-blowing type outdoor
unit 2 has the blower fan 16 provided at the upper portion,
the air velocity of the air that passes through the outdoor
heat exchanger 9 due to the suction of the outdoor air by the
blower fan 16 is high (fast) on the upper portion side, which
is close to the blower fan 16 and low (slow) on the lower
portion side, whichis far from the blower fan16, as indicated
by the arrows in FIG. 2. Therefore, the air velocity
distribution of the air passing through the outdoor heat
exchanger 9 becomes nonuniform.
[0018]
Next, the outdoor heat exchanger 9 will be described
using FIG. 3. In FIG. 3, the upper portion side indicates
an upward direction, and the lower portion side indicates a
downward direction, in a state where the outdoor heat
exchanger 9 is installed. The outdoor heat exchanger 9
includes an inlet header 20, an outlet header 21, a plurality
of flat tubes 22, a plurality of heat transfer fins 23, a
plurality of branch pipes 24a to 24c having the same diameter, and a distributor 25. The inlet header 20 and the outlet header 21 are with reference to the flow of the refrigerant in the refrigerant circuit 11 during the heating operation, the refrigerant flows into the inlet header 20 and the refrigerant flows out from the outlet header 21 during the heating operation, and the refrigerant flows into the outlet header 21 and the refrigerant flows out from the inlet header
20 during the cooling operation. In the present embodiment,
the number of the flat tubes 22 is conveniently set to 14.
[0019]
Each of the plurality of flat tubes 22 is formed in a
linear band shape. The plurality offlat tubes 22 is arranged
between the inlet header 20 and the outlet header 21 and is
stacked with a predetermined spacing in a vertical direction.
One end of the plurality of flat tubes 22 is connected to the
inlet header 20 and the other end of the plurality of flat
tubes 22 is connected to the outlet header 21. A plurality
of through-holes (not illustrated) is formed in the flat tube
22 from one end to the other end, and the refrigerant flows
through the through-holes. In FIG. 3, the higher the flat
tube 22 is in the upward direction, the higher the air velocity
received is, and the lower the flat tube is in the downward
direction, the lower the air velocity receivedis. Therefore,
as for the amount of heat exchange between the refrigerant
that flows through the flat tube 22 and the outdoor air, the
higher the flat tube 22 is in the upward direction, the larger
the amount of heat exchange is, and the lower the flat tube
22 is in the downward direction, the smaller the amount of
heat exchange is.
[0020]
The plurality of heat transfer fins 23 is stacked spaced
from each other between the inlet header 20 and the outlet
header 21, having a plate-shape through which air passes, and
the heat transfer fins 23 are thermally connected to the
plurality of flat tubes 22 that penetrates the heat transfer
fins 23.
[0021]
The inlet header 20 and the outlet header 21 are formed
in a tubular shape, the refrigerant pipe 10 is connected to
the outlet header 21 and a plurality of branch pipes 24a to
24c is connected to the inlet header 20. The inside of the
inlet header 20 is partitioned by partition plates 30, and
forms a plurality of rooms 31a to 31g. The partition plates
30 are arranged such that the height of each room of the rooms
31a to 31g is the same, and the size of each room of the rooms
31a to 31g is the same. In the present embodiment, the inside
of the inlet header 20 is partitioned by six partition plates
30, and seven rooms 31a to 31g are formed vertically. The
plurality of flat tubes 22 connected to the inlet header 20
is connected to each room of the rooms 31a to 31g with two
tubes.
[0022]
The distributor 25 is connected to the refrigerant pipe
10 extending from the outdoor unit-side expansion valve 7 and
the three branch pipes 24a to 24c extending from the inlet header 20. The branch pipe 24a, which is one of the three branch pipes 24a to 24c, connected to the distributor 25 is connected to the room 31a located at the highest height in a height direction of the outdoor heat exchanger 9. The branch pipe 24b, which is one of the three branch pipes 24a to 24c, is divided into two branch pipes 24b by the branch portion 27, and one of the two branch pipes 24b is connected to the room 31b located at the second height, and the other one of the two branch pipes 24b is connected to the room 31c located at the third height. Therefore, one branch pipe 24b connected to the distributor 25 is divided into two by one branch portion 27 and is connected to the two rooms 31b and
31c, respectively. The branch pipe 24c, which is one of the
three branchpipes 24a to 24c, is dividedinto twobranchpipes
24c by the branch portion 27, and one of the two branch pipes
24c is further divided into two by the branch portion 27, and
then one of the two branch pipes 24c is connected to the room
31d located at the fourth height, and the other one of the
two branch pipes 24c is connected to the room 31e located at
the fifth height. Similarly, the other one of the two branch
pipes 24c is further divided into two branch pipes 24c by the
branch portion 27, and then one of the two branch pipes 24c
is connected to the room 31f located at the sixth height, and
the other one of the two branch pipes 24 is connected to room
31glocatedat the seventhheight. Therefore, one branchpipe
24c connected to the distributor 25 is first divided into two
by the first branch portion 27, and further divided into two by the second branch portion 27, and the divided branch pipes are connected to the rooms 31d to 31g, respectively.
[0023]
As for the amount of refrigerant flowing into each room
of the rooms 31a to 31g of the outdoor heat exchanger 9, since
in a case where the amount of refrigerant flowing from the
outdoor unit-side expansion valve 7 to the distributor 25
during the heating operation is 1, the three branch pipes 24a
to 24c formed of the same diameter are connected to the
distributor 25, and the branch pipe 24a does not have the
branch portion 27, the refrigerant in an amount of 1/3 flows
into the room 31a located at the highest height. Since there
is one branch portion 27 in the middle of the branch pipe 24b,
the refrigerant in an amount of 1/6 flows into each room of
the rooms 31b and 31c located at the second height and the
third height. Similarly, since the two branch portions 27
are in the middle of the branch pipe 24c, the refrigerant in
an amount of 1/12 flows into each room of the rooms 31d to
31g.Therefore, since the distribution amount of refrigerant
flowing into the room 31a, to which the flat tubes 22 located
in a range where the air velocity is high are connected, is
set to be increased, the distribution amount of refrigerant
flowing into the rooms 31b and 31c, to which the flat tubes
22 located in a range where the air velocity is medium are
connected, is set to be medium, and the distribution amount
of refrigerant flowing into the rooms 31d to 31g, to which
the flat tubes 22 located in a range where the air velocity
is low are connected, is set to be decrease, the refrigerant flow rate can be adjusted according to the airflow rate.
Therefore, the ability of the heat exchanger to make the state
ofthe refrigerantuniformat the outlet side ofthe flat tubes
can be fully exhibited. That is, since the flowing amount
of the refrigerant in the upper portion where a large amount
of heat exchange can be expected increases and the flowing
amount of the refrigerant in the lower portion where the
amount of heat exchange is small decreases, the entire heat
exchanger can function without waste.
[0024]
In the embodiment of the present invention, in the three
branch pipes 24a to 24c connected to each room of the rooms
31a to 31g, which are arranged in the vertical direction of
the inlet header 20, and the distributor 25, the branch
portions 27 are provided depending on the air velocity
distribution in the outdoor heat exchanger 9.In other words,
in the branch pipe 24a connected to the room 31a, which is
located in a range where the air velocity is high, and the
distributor 25, the branch portion 27 is not provided between
the distributor 25 and the room 31a. In the branch pipe 24b
connected to the rooms 31b to 31e, which are located in a range
where the air velocity is medium, and the distributor 25, one
branch portion 27 is provided between the distributor 25 and
the rooms 31b to 31e. In the branch pipe 24c connected to
the rooms 31d to 31g, which are located in a range where the
air velocity is low, and the distributor 25, two branch
portions 27 are provided between the distributor 25 and the
rooms 31b to 31e. As a result, the larger the number of the branch portions 27 provided between the distributor 25 and each room 31, the smaller the amount of the refrigerant that flows into the room 31.
[00251
In the embodiment of the present invention, in the three
branch pipes 24a to 24c connected to each room of the rooms
31a to 31g, which are arranged in the vertical direction of
the inlet header 20, and the distributor 25, the branch
portions 27 are provided depending on the air velocity
distribution in the outdoor heat exchanger 9. Therefore, the
substantialamount ofheat exchange becomes approximately the
same in the vertical direction of the outdoor heat exchanger
9, and the refrigerant state of the outlet header 21 can be
aligned. Comparedwitha case where the flow rate is adjusted
by increasing the flow path resistance using a conventional
capillary tube, since the refrigerant state of the outlet
header 21 can be aligned without increasing the pressure loss
of the refrigerant passing through the heat exchanger, a
decrease in the cooling and heating capacity of the air
conditioner due to the increased pressure loss can be
suppressed. In addition, the embodiments of the present
invention have the following effects in addition to the
present effects.
[0026]
The inside of the inlet header 20 is partitioned by the
partition plates 30, and the partition plates 30 are arranged
such that the height of each room of the rooms 31a to 31g is
the same, and the size (volume) of each room of the rooms 31a to 31g is the same. Therefore, since it is not necessary to adjust the height ofeachroomofthe rooms 31a to 31gaccording to the air velocity distribution in the outdoor heat exchanger
9 and the specifications of the outdoor heat exchanger, it
is possible to reduce the manufacturing cost.
[0027]
The three branch pipes 24a to 24c connected to each room
of the rooms 31a to 31g, which are arranged in the vertical
direction of the inlet header 20, and the distributor 25 are
branch pipes having the same diameter. Therefore, since it
is not necessary to adjust the diameters of each of the branch
pipes 24a to 24c according to the air velocity distribution
in the outdoor heat exchanger 9 and the specifications of the
outdoor heat exchanger, it is possible to reduce the
manufacturing cost. Further, only by setting the number of
the branch portions 27 provided between the distributor 25
and each room 31 according to the air velocity distribution
in the outdoor heat exchanger 9 and the specifications of the
outdoor heat exchanger, the amount of refrigerant flowing
into each room of the rooms 31a to 31g can be adjusted.
Therefore, it is possible to reduce the manufacturing cost.
[0028]
In the present embodiment, with reference to the flow
of the refrigerant in the refrigerant circuit 11 during the
heating operation, the refrigerant flows into the inlet
header 20 during the heating operation, in a case where the
refrigerant flows out from the outlet header 21, the
distributor 25 is arranged on an inflow side, the inside of the inlet header 20 on the inflow side is partitioned by the partition plates 30, and forms the rooms 31a to 31g having the same height, the three branch pipes 24a to 24c connect each room of the rooms 31a to 31g and the distributor 25, the branch portions 27 are provided in the three branch pipes 24a to 24c depending on the air velocity distribution in the outdoor heat exchanger 9, but the reverse configuration is also acceptable. That is, with reference to the flow of the refrigerant in the refrigerant circuit 11 during the heating operation, the refrigerant may flow into the inlet header 20 during the heating operation, in a case where the refrigerant flows out from the outlet header 21, the refrigerant may flow into the inletheader 20 on the inflow side through the outdoor unit-side expansion valve 7, the distributor 25 may be arranged on an outflow side, the inside of the outlet header
21 on the outflow side may be partitioned by the partition
plates 30, forming the rooms 31a to 31ghaving the same height,
the three branch pipes 24a to 24c may connect each room of
the rooms 31a to 31g and the distributor 25, the branch
portions 27 may be provided in the three branch pipes 24a to
24c depending on the air velocity distribution in the outdoor
heat exchanger 9. Even in this case, the same effect can be
obtained. In addition, although the air conditioner 1 of the
present embodiment is an air conditioner capable of a cooling
operation and a heating operation, it may be an air
conditioner capable ofeither a cooling operation or aheating
operation.
[0029]
Although the present invention has been described with
reference to the definite number of embodiments, the scope
of the present invention is not limited thereto and
modifications of the embodiments based on the above
disclosure are obvious to those skilled in the art.
Reference Signs List
[00301
1 air conditioner
2 outdoor unit
3 indoor unit
4 compressor
5 four-way valve
6 indoor unit-side expansion valve
7 outdoor unit-side expansion valve
8 indoor heat exchanger
9 outdoor heat exchanger
10 refrigerant pipe
11 refrigerant circuit
15 chassis
16 blower fan
17 suction port
18 ventilation port
20 inlet header
21 outlet header
22 flat tube
23 heat transfer fin
24a to 24c branch pipe
25 distributor
27 branch portion
30 partition plate
31a to 31g room
Claims (4)
1. A heat exchanger comprising:
an inlet header located on a refrigerant inlet side;
an outlet header located on a refrigerant outlet side;
a plurality of rooms partitioned by partition plates
and provided inside one header of the inlet header or the
outlet header;
a plurality of flat tubes connected in parallel between
each room of the plurality of rooms provided in the one header
of the inlet header or the outlet header and the other header
of the inlet header or the outlet header;
a distributor provided in a refrigerant pipe;
a plurality of branch pipes connected to each room and
the distributor,
wherein the branch pipe has a branch portion provided
between the room and the distributor depending on an air
velocity distribution in the heat exchanger, and
the number of the branch portions of the branch pipe
connected to the room, to which the flat tubes located in a
part having a high air velocity are connected, is less than
the number of the branch portions of the branch pipe connected
to the room, to which the flat tubes passing through a part
having a low air velocity are connected.
2. The heat exchanger according to claim 1,
wherein a length of each room in a direction in which
the flat tubes connected in parallel are arranged is the same.
3. The heat exchanger according to claim 1 or 2,
wherein the one header is the inlet header and the other
header is the outlet header.
4. An upward-blowing type outdoor unit of an air
conditioner, comprising:
a blower fan provided at an upper portion;
the heat exchanger according to any one of claims 1 to
3 provided below the blower fan,
wherein, in the heat exchanger, a parallel direction
of the plurality of flat tubes is a vertical direction, and
the inlet header and the outlet header are installed upright
in the vertical direction.
20
2 V A!
1/3
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021056043A JP7279730B2 (en) | 2021-03-29 | 2021-03-29 | Heat exchanger, outdoor unit with this heat exchanger |
| JP2021-056043 | 2021-03-29 | ||
| PCT/JP2022/012064 WO2022209919A1 (en) | 2021-03-29 | 2022-03-16 | Heat exchanger, and outdoor unit comprising said heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2022249485A1 true AU2022249485A1 (en) | 2023-10-12 |
Family
ID=83459010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2022249485A Pending AU2022249485A1 (en) | 2021-03-29 | 2022-03-16 | Heat exchanger, and outdoor unit comprising said heat exchanger |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240175643A1 (en) |
| EP (1) | EP4317812A1 (en) |
| JP (1) | JP7279730B2 (en) |
| CN (1) | CN117063021A (en) |
| AU (1) | AU2022249485A1 (en) |
| WO (1) | WO2022209919A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0335990Y2 (en) * | 1985-12-24 | 1991-07-30 | ||
| JP5071685B2 (en) * | 2008-12-01 | 2012-11-14 | 株式会社富士通ゼネラル | Air conditioner |
| WO2013160952A1 (en) * | 2012-04-26 | 2013-10-31 | 三菱電機株式会社 | Coolant distributor, and heat exchanger equipped with coolant distributor |
| CN209459264U (en) * | 2018-12-05 | 2019-10-01 | 锦江百浪新能源有限公司 | Evaporator |
-
2021
- 2021-03-29 JP JP2021056043A patent/JP7279730B2/en active Active
-
2022
- 2022-03-16 CN CN202280024997.7A patent/CN117063021A/en active Pending
- 2022-03-16 US US18/284,099 patent/US20240175643A1/en active Pending
- 2022-03-16 AU AU2022249485A patent/AU2022249485A1/en active Pending
- 2022-03-16 WO PCT/JP2022/012064 patent/WO2022209919A1/en active Application Filing
- 2022-03-16 EP EP22780139.6A patent/EP4317812A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022153026A (en) | 2022-10-12 |
| CN117063021A (en) | 2023-11-14 |
| EP4317812A1 (en) | 2024-02-07 |
| JP7279730B2 (en) | 2023-05-23 |
| WO2022209919A1 (en) | 2022-10-06 |
| US20240175643A1 (en) | 2024-05-30 |
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